Video of Filter Press

Filter Press

How Filter Press Works?

Filter press operates by filtering of solid-liquid mixture sludge, fed by high-pressure pumps, through filter cloths covered over filter press plates, and thus accumulation of solid particles among filter plates and removal of the liquid phase out of the equipment.

The cloths used in filter press equipments can be made of polypropylene, cotton, chopped fibre, or other raw materials according to the physico-chemical properties of the solid-liquid mixture to be filtered.

The high-pressure pumps that feed materials to the filter press can be selected from air diaphragm pumps, mono-pumps, oil gear pumps, or lobe pumps. Pumps operating via centrifuge are usually not preferred in filter press systems.

Dewatering ratio is higher in filter press equipment compared to its equivalents such as decanter and belt press equipments.

Feeding is made by pressurizzed pumps in the form of plates compressed by high hydraulic pressure.

The solid substances accumulating in the volume in between the plates are removed by opening the plates.

Cake discharge is designed as manual or automatic according to system requirements and customer preferences.

In addition to treatment plants, filter presses are used in various other industries such as mining, oil filtering, marble, chemistry, silicate, acid filtering in plating baths (zinc-phosphate), and food etc.

Filter presses are divided into 3 groups according to their plate compressing characteristics as manual, semi-automatic, and full automatic filter presses.

They are also divided into three essential groups based on their plate characteristics such as chamber-type plates, solid-hollow type plates (frame&plate), and chamber+membrane plates.

Filter press cloths (filter cloth) have significance in filtering operation. Therefore, selection of cloths should be made appropriately according to the relevant sector. Filter press cloths are required to be washed with pressurized water at certain intervals in order to extend their expected lives.

In addition to making standard filter press production, City Makine also produces sector-specific filter presses with desired sizes, properties, and fair prices.